Fans of US Gold's Comanche will definitely not feel at home with this game as it takes a reasonable amount of practice before you can control the helicopters with any degree of success.
Hardened helicopter buffs will no doubt greatly appreciate the differing handling characteristics of the four machines available, but uneducated heathens such as myself will be hard pushed to tell the difference.
Technical detail is the order of the day here. Whether this makes for a fun game depends really on what you are looking for. You should really be prepared to put in a lot of effort to get any kind of enjoyment from it - Hokum's not the kind of game that you can load up for a 20 minute blast at all.
One of the strongest points is the excessively pretty virtual environment - the whole game just oozes with tropical islandness.